CPM Homework Banner

Home > MC2 > Chapter 1 > Lesson 1.2.5 > Problem 1-110


Mario is trying to explain to Marissa how to add fractions. He has written the work below.

  1. Why did Mario start by rewriting the fractions using a Giant One? Why did he choose as his new denominator?

    Refer to the Math Notes box in Lesson 1.2.4. The denominators need to be the same to add the fractions.

  2. Finish the problem. Explain each step you would take, and why.

    Step 1:

    Giant One: 5 divided by 5          Giant One: 4 divided by 4

    Now that the denominators are the same, try solving the problem by adding the numerators.